Adjustable and portable false work for arches.



' PATENTE'DAUG. 6, 190' J. E. STREET. RTABLE FALSE WORK FOR ARGHES.APPLICATION FILED NOV. 14. 1906.

ADJUSTABLE AND P0 Q Av 52 M Jam? 5 Street, /j

Invent 1-": minus rzrnrs UN TED STATES PATENT onnron.

JACOB E. STREET, OF SAN FERNANDO, CALIFORNIA, ASSIGNO'R or ONE-HALF ToRIGHARl) WILLIAM MARTIN, OF Los ANGELES, CALIFORNIA.

ADJUSTABLE AND PORTABLE FALSE WORK FOR ARGHES.

To all whom it may concern:

Be it known that I, .lacon E. STREET, a citizen of the United States,residing at San Fernando, in the county blocks, solid concrete, or othermaterial in an BifiClGIll;

manner at less cost of time, labor and expense than heretofore possible;to enable constructors to line railway and other tunnels with stone,concrete blocks, or other material at small expense of time and labor;to enable railways to replace wooden linings'in their tunnels a.practicable way without interfering with traflic through the tunnel; andto provide portable means adapted to be transported in.knock-down formon railway cars for the construction of lining in railway tunnels andother arches.

The accompanying drawings illustrate the invention:

Figure 1 is an elevation of the apparatus embodying this invention as itappears in use for replacing withconcrete blocks the wooden lining in arailway tunnel 1 without interruption of the usual trafiic. Dotted lines25 indicate the position of parts preparatory to withdrawing theapparatus from the tunnel to allow a train to pass. Fig. 2 is afragmental plan view partially in section to expose parts which wouldotherwise be hidden. Lines 11;, Fig. 1, indicate the lines of section.Fig. 3 is a vertical section on line x Figs. 1 and 2, cuttingaxiall'ythrough a liinge and adjustable side arm.

1 designates a portable base in the form of a platform 1 railway car,mounted on wheels 2 running on rails 3.

4 in a general way designates extensible supporting means carried bysaid'portable base 1 and arranged to adjustably support an arch formindicated in a general way by the character 5. Said form is preferablysectional, comprising a crown section 6 and two spring sections 7 whichare hinged to the opposite sides of the crown section by pins 8. Theextensible supporting means 4 comprise anadjustable crown support 9 andtwo adjustable spring supports 10. The crown and spring sections arepreferably flexible, being bendable to a suflicient extent to allow thesame to conform to the form of the arch within an indefinite limit ofadjustment, and to allow the arch-form to be contracted when thesupports are adjusted for that purpose.

The crown support and spring supports may be variously constructed 'ofsuitable mechanical means for bringing the crown and spring sections ofthe arch form to an appropriate position above the portable base toafford a support for the structural material of the arch. Each of saidadjustable supports comprises a threaded journaled base. The adjustablecrown support 9 and the adjustable spring supports 10 are preferably inthe Specification of Letters Patent.

- Application filed Nov mb r 14.1906. Serial No. 348,445.

Patented Aug. 6, 1907.

V form of T jacks in which 11 is the supporting '1 of the 'jacks.

12 designates screw rods; l3, the burs or shoulders on which restU-heads 14 which are bolted, riyeted, or otherwise secured to therespective sections of the arch form.

'15 designates the head burs on the screw-rods above the base of theU-heads for securing the screw-rods in place.

l6 designates jack levers to turn the screw-rods to raise and lower thearch form sections. 5

17 designates U-bolts securing the We of the jacks in place. Duplicateand triplicate parts are indicated by In practical use, as for instancein constructing the lining in a railway tunnel without interfering withtraffic, the constructor will run the portable base 1 along the track 3'to the appropriate place at a time placed in position on the arch formment mortarg i v The work of adjusting the form to the appropriateposition consumes but a very few minutes, so that the workmen may atonce proceed to lay a course of blocks. These may be laid with brokenjoints in 'WGll-kllOWIl manner, leaving each alternate block projectingbeyond or in front of the arch form. If sufficient time remains for theworkmen to'shift the machine and complete another course, the-workmenwill turn the screws 12 to lower the arch forin' and will then shift thebase 1 along the track the width of the arch-form, and will then againadjust the archform to the form of the arch, and thereupon anothercourse will be laid, and so on until the time approaches for a traintopass. Then the screws will be turned to lower the form, and the carwill be run out of the' tunnel and side-tracked to allow the train topass, and immediately thereafter the apparatus may be again brought intoposition in the tunnel, again adjusted, and the work immediately proceedas before.-

The sections of the arch formmay be made of any suitable material, asfor instance, boiler iron, heavy galvanized plate iron, or steel, andthe like, the same being appropriately curved to conform to' the desiredshape of the arch. i

It is to be understood that in constructing the liningit is advisable toconstruct the vertical portions of the lining ahead of the archconstruction, so that all that remains to be done while the apparatus isin use is to simply turn the arch.

corresponding numbers with the addition of an index.

when no trains are du, and when the arch form has been brought to theappropriate place, [the screw rods will} be turned to bring the archform into the appropriate/ position and form-to support the structuralmaterial ofi which the tunnel lining is to be made. -In case, for-i,

instance, concrete blocks are to be used, thesewill' be I 5 and laidwith ceso The r-iaek's a or slotted base 18 through which the screw-rodsproject downward so as to allow the arch-form to be lowered toward thebody of the car so that it may be trans ported along the road throughbridges and tunnels without dismantling. In case further contraction ofthe apparatus is required for storage or transportation, this may beaccomplished by removing the pins 8, removing the screw-rods from theTbase, or in any other way dismantling the machine.

The crown form section 6 and spring form sections.

7, 7, may be of bendable material, as boiler iron for instance, so thatwhen the operators desire to shift the apparatus they may screw thespring supports 10, 10 down further than they screw the crown support 9,and thereupon the crown section 6 may bend so as to allow the springsections to be drawn away slightly from the walls of the lining.However, by setting the spring supports 10, 10 outward beyond the pivotsbetween said spring supports and the crown support, the same effect maybe secured without bending the crown section; and in the act of loweringthe arch form the spring supports may first be screwed downindependently of the crown support, thus bringing the same away from thespring and side walls of the arch, and then the crown support may bescrewed down. A small adjustment of parts in this manner will besuflicient to release the arch form from the arch and allow theapparatus to be shifted, whereupon the operators may first adjust thecrown section to the appropriate position and then adjust the springsections to their. appropriate positions, whereupon another course maybe laid, and so on.

It is to be understood that I do not limit myself to the use of theparticular means herein shown as being preferable. Various equivalentsmay readily suggest themselves to those versed in the art, and I regardpreferably mounted on a'mo'rtised' the end or said screw-rods above theII-heads below the arch form, and shoulders on said rods below saidU-heads and a base in which said T-jacks are journaled.

3. A truck, three supports adjustable as to length journalcd on saidtruck to swing sidewise thereof, and an arch form comprising threesections hinged together, said sections respectively supported by saidsupports.

4. A truck, a support adjustable as to length mounted on said truck, acrown section of an arch form on said support. side supports adjustableas to length and jour' nalcd on the truck to swing toward and from thecenter support and each provided at its top with a bracket, spring archsections on said brackets respectively, and means for detachablyfastening thespring arch sections to the crown section.

An arch form comprising a crown section, spring sections pivotedthereto, an adjustable crown section support, and adjustable springsection supports, the latter supports being journaled to swing andattached outwardly from the pivotal connections between the crownsection and the spring sections respectively, and a base in whichsaidlatter supports are journaled.

G. A portable base, an arch form comprising a plurality of sectionshinged together and supports, adjustable as to length. journaled to saidbase and connected with said sections respectively.

In testimony whereof, I have hereunto set my hand at Los Angeles,California this 8th dayof October 1906.

JACOB E. STREET.

In presence of--- Luius R. TOWNSEND, R. W. hIAll'llN.

